<template>
    <div class="header-container">
        <div class="header-left flex-box">
            <el-icon class="icon" size="20" @click="store.commit('collapseMenu')"><Fold /></el-icon>
            <ul class="flex-box">
                <li 
                   v-for="(item, index) in selectMenu"
                   :key="item.path"
                   :class="{selected: route.path === item.path}"
                   class="tab flex-box">
                    <el-icon size="12"><component :is="item.icon" /></el-icon>
                    <router-link class="text flex-box" :to="{ path: item.path }">
                        {{ item.name }}
                    </router-link>
                    <el-icon size="15" class="close" @click="closeTab(item, index)"><Close /></el-icon>
                </li>
            </ul>
        </div>
        <div class="header-right">
            <el-dropdown>
                <div class="el-dropdown-link flex-box">
                    <el-avatar src="https://cube.elemecdn.com/0/88/03b0d39583f48206768a7534e55bcpng.png" />
                    <p class="user-name">admin</p>
                </div>
                <template #dropdown>
                <el-dropdown-menu>
                    <el-dropdown-item>Action 1</el-dropdown-item>
                    <el-dropdown-item>Action 2</el-dropdown-item>
                    <el-dropdown-item>Action 3</el-dropdown-item>
                    <el-dropdown-item disabled>Action 4</el-dropdown-item>
                    <el-dropdown-item divided>Action 5</el-dropdown-item>
                </el-dropdown-menu>
                </template>
            </el-dropdown>
        </div>
    </div>
</template>
<script setup>
import { computed } from 'vue'
import { useStore } from 'vuex'
import { useRouter, useRoute } from 'vue-router'

const store = useStore()
// 当前的路由对象
const route = useRoute()
const router = useRouter()

const selectMenu = computed(() => store.state.menu.selectMenu)
// 点击关闭tag
const closeTab = (item, index) => {
    
    store.commit('closeMenu', item)
    // 删除的非当前页tag
    if (route.path !== item.path) {
        return
    }
    const selectMenuData = selectMenu.value
    console.log(selectMenuData,"selectMenuData")
    // 删除的最后一项
    if (index === selectMenuData.length) {
        // 如果tag只有一个元素
        if (!selectMenuData.length) {
            router.push('/')
        } else {
            router.push({
                path: selectMenuData[index -1].path
            })
        }
    } else {
        router.push({ // 如果删除的是中间位置tag
            path: selectMenuData[index].path
        })
    }
}
</script>
<style lang="less" scoped>
.flex-box {
    display: flex;
    align-items: center;
    height: 100%;
}
.header-container {
    display: flex;
    justify-content: space-between;
    align-items: center;
    height: 100%;
    background-color: #fff;
    padding-right: 25px;
    .header-left {
        height: 100%;
        .icon {
            width: 45px;
            height: 100%;
        }
        .icon:hover {
            background-color: #f5f5f5;
            cursor: pointer;
        }
        .tab {
            padding: 0 10px;
            height: 100%;
            .text {
                margin: 0 5px;
            }
            .close {
                visibility: hidden;
            }
            &.selected {
                a {
                    color: #409eff;
                }
                i {
                    color: #409eff;
                }
                background-color: #f5f5f5;
            }
        }
        .tab:hover {
            background-color: #f5f5f5;
            .close {
                visibility: initial;
                cursor: pointer;
                color: #000;
            }
        }
    }
    .header-right {
        .user-name {
            margin-left: 10px;
        }
    }
    a {
        height: 100%;
        color: #333;
        font-size: 15px;
    }
}
</style>